https://git.ruby-lang.org/ruby.git/commit/?id=eaff19de2b

From eaff19de2b31dc2133ba477291498d66bf3448bd Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Tue, 27 Aug 2019 23:41:51 +0900
Subject: Fix rb_thread_create argument type

in response to the declaration change in
e3fc30564e9466d6926f9d25a090dcf787bd5c33.

Fixing the AppVeyor mswin CI failure:
https://ci.appveyor.com/project/ruby/ruby/builds/26980881/job/2j6h1qwjnbc8cpop

ref: https://github.com/ruby/ruby/pull/2404

diff --git a/spec/ruby/optional/capi/ext/thread_spec.c b/spec/ruby/optional/capi/ext/thread_spec.c
index b10d557..2f5678c 100644
--- a/spec/ruby/optional/capi/ext/thread_spec.c
+++ b/spec/ruby/optional/capi/ext/thread_spec.c
@@ -125,7 +125,7 @@ static VALUE thread_spec_rb_thread_create(VALUE self, VALUE proc, VALUE arg) { https://github.com/ruby/ruby/blob/trunk/spec/ruby/optional/capi/ext/thread_spec.c#L125
   rb_ary_push(args, proc);
   rb_ary_push(args, arg);
 
-  return rb_thread_create(thread_spec_call_proc, (void*)args);
+  return rb_thread_create((VALUE (*)(void *))thread_spec_call_proc, (void*)args);
 }
 
 
-- 
cgit v0.10.2


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